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British Museum (Natural History) The Cephala-spids of Great Britain

Nature volume 134, page 200 (11 August 1934) | Download Citation

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Abstract

THE Cephalaspids are among the oldest fossil fishes which are known by nearly complete specimens. They are found in the Upper Silurian, Downtonian and Devonian fresh-water deposits of Europe and North America; and they seem to have lived on the bottom like certain modern Siluroid fishes, which they much resemble in out ward shape. They are specially important because the fossils exhibit not only the external armour, but also enough of the internal skeleton of the head and branchial region to reveal the arrange ment of many soft parts. They thus make it possible to discover some of the fundamental characters of fishes in their beginning.

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DOI

https://doi.org/10.1038/134200a0

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